Type-writer roller.



A. G. HUG.' TYPE WRITER RLLER.

APPLICATION FILED AUG.11. 1911.

Patented Feb. 18, 1913.

A. G. HUG. TYPE WRITER lROLLER.

APPLTGATON FILED AUG. 11, 1011 P'elltd'Feb. f1 8, 1913.

11 ETS- @Minga/' .bg/MQW?" lau ALEXANDER vHUG, 0F CHIICAGLO, ILLINOIS.

Specification of 'Letters Patent.

,Patentedneb. 18, 1913.

Application filed August 11, 1911. Serial No. 643,563.

To' all 'whom it may concern.' v Be it known that I, ALEXANDER G. 4HUG,a citizen of the United States, residin at Chicago, in the county ofCook and tate of I1linois,.have invented a new and useful Improvement inType-,Writer Rollers, of which the following is a/speciication.` v Myinvention relates'toan improvement in the class of platens for'typewriting-machines, the construct-ion of which is designed to reduceto the minimum thenoise of the type in striking.

. The object of my im rovement4 is to provide a novel construction ofroller in the class 'referred to which shall greatly enhance its qualityof noiselessness in the particular referred to.

In theacc'ompanying drawings, Figure l .is a view in elevation, partlybroken and sectional, of my improved platen; Fig. 2 is an end view ofthe `Same; Fig-3 is an enlarged section on line 3, Fig. 1; Fig. 4 is aperspective View of alskeleton-frame for reinforcing the platen-core,with one corehead shown in una-ssembled relation to the remainder of theframe; Fig. 5 isa perspective view of the core, and Figs. 6 and 7 areperspective views of the bearing-heads of the roller, which are securedto the coreheads. f

The core 8, which is preferably of cylindrical shape and which forms thesalient feature of my invention, is composed of a wood ofv pith-likeconsistency possessing, in a very high degree, the qualities offibrousness, lightness, l softness and non-resilient yieldingness topressure exerted against the surface of the core. As the preferred woodfor my purpose I use that of the yucca palm, as bein extremely fibrousand light, and soft an yielding without elasticity, whereby it ispeculiarly adapted for dea-dening noise. The cylinder 8 is formedl bycutting' this wood into proper shape and providing it, or not, with aplurality of longitudinal grooves 9 at uniform intervals in its surface,and with a central bore 10 for a sustaining-rod (not shown). Thiscylinder is reinforced by a skeleton-frame 11, consistin of disk-shapedmetal heads 12 and 13, with metal. rods 14 connecting them, preferablyby being riveted atitheir shouldered ends `in holesprovided for them inthe head 12, and. riveting their similar opposite ends in holes providedto admit them in the head 13, but after the frame, minus the. last-namedhead, has been applied to thel rods may b e'passedlengthwise through the`substance of the cylinder, which is easily penetrable by them becauseof the l'- ht, villen v fibrous and soft quality of the wood,

Frou.-

the head 13 may be permanently fastened to the protruding rod-ends;Similar bearingheads 15, 15. are secured to the core-heads, as by meansof screws 16 (Fi 2). l The core is inclosed in an external cy 17 ofrubber vulcanized to any desired degree of hardness; and between thissheath and the core is interposedlabout the latter a suitably thicklayer or filling 18 of rub'- ber of the character known in the art as songe rubber,l which is light in weight, so .and at 4the 'same timeresilient, and

very 4durable by reason ofits propertyA of' resisting the 4hardeningeffect on rubber of oxidation. 4 It is preferred to form the resilientfilling 18 integralwith the inner sur;v face of the platen-sheath 17, asindicated, which may be done by cementing and vulcanizin it thereon. v

The impact of the typedof a type-writing machine against the sheath, asusual, is opposed by the resilient action of the lining 18, with theeiect of causing.. the type to rebound and thus attack the roller with alight stroke, much like that of the re. bounding hammer in apiano-action, whereby the type engagement with the ribbon of the machineis rendered vcomparatively light and the life of the ribbon isprolonged, since less of its ink-content is therebyexpended. The soft,yielding and non-resili- Indrical sheath( ent qualities of the core tendto deaden the i noise of the type-stroke and thus-to render theoperation ofthe machine noiseless; and the core, by reason of thepeculiar character of the wood composing 1t, is solight in weightthat,even with the metal of its frame 11 added, my improved-roller remainsadequately light to avoid overweighting the reciprocating carriage of amachine equipped with it.l ,l `f v f The cylinder 8,- of pithlikefibrous wood is an important feature of my improved roller, butl thelining 18 of spongfy rubber, or rubber `that is soft and o light weightrelatively to that ofthe sheath 17 and which is preferablyA integraltherewith,

is an equally important feature and adapts the sheath, composed of thetwo varieties of rubber, to vbe used, with the advanta es referred to,with` a core of ordinary. so id wood, which should, by preference, be ofa soft and light-weight variety; and I intend to be understood asincluding such construction within my invention. When this lastdescribedconstruction is employed, the frame 11 may be vdispensed with, since thecore does not require to be reinforced by any frame.

What I claim as Vw and desire to secure by Letters Patent, is

A type-writer roller comprising, in combination, a cylindrical corecomposed of wood and provided with a central longitudinal bore, askeleton-frame consisting of rods extending lengthwise through the coreand disk-shaped heads at the core-ends connected by the rods,disk-shaped bearingheads secured to the core-heads, a rubber sheathabout the core and a illing of sponge-rubber between the sheath andcore, for the purpose set forth.

ALEXANDER G. HUG.

In presence of- J. G. ANDERSON, R. A. SCHAEFER.

